The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1999
Filed:
Apr. 27, 1998
Andrew F Tresness, Manlius, NY (US);
Martin L Zelenz, DeWitt, NY (US);
Tresness Irrevocable Patent Trust, Syracuse, NY (US);
Abstract
The present invention is a passive filter for controlling the return path loss in a communication system having a forward path and return path. The filter comprises first and second terminals, a passive filter network, and a compensation circuit. The passive filter network is coupled to the first and second terminals and to ground. The filter network has a first passband which passes signals in the forward path and a second passband which passes signals in the return path. The filter network includes a passive attenuator network which attenuates signals in the return path by a predetermined amount as the signals pass through the second passband. The compensation circuit is coupled to the passive filter network, and is configured to compensate for expected perturbations in the frequency response of the second passband of the filter network.